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V-233321

CAT II (Medium)

Forescout must enforce the revocation of endpoint access authorizations at the next compliance assessment interval based on changes to the compliance assessment security policy. This is required for compliance with C2C Step 4.

Rule ID

SV-233321r1270630_rule

STIG

Forescout Network Access Control Security Technical Implementation Guide

Version

V2R6

CCIs

CCI-000213

Discussion

This requirement gives the option to configure for automated remediation and/or manual remediation. A detailed record must be passed to the remediation server for action. Alternatively, the details can be passed in a notice to the user for action. The device status will be updated on the network access server/authentication server so that further access attempts are denied. The NAC must have policy assessment mechanisms with granular control to distinguish between access restrictions based on the criticality of the software or setting failure.

Check Content

If DoW is not at C2C Step 4 or higher, this is not a finding.

Verify Forescout admission policy has been configured to revoke access, remediate, or quarantine endpoints that have not met, or fall out of, compliance. 

If Forescout is not configured with an admission policy that enforces the revocation, quarantine, or remediation of endpoint access authorizations based on when devices fall out of compliance, this is a finding.

Fix Text

Use the Forescout Administrator UI to configure the authorization policy to perform a control action on any devices that have not met the authorization requirement or are no longer authorized. 
1. Log on to the Forescout UI. 
2. From the Policy tab, check that the authorization policy has a Block Action enabled on any devices that have not met or are removed from the authorized group.